[jerska]

Great article, the example makes the point really clear. It probably applies just as well to other languages by the way.

Two small notes after completing my read:

1. You're using `npm prune --omit=dev` after the build. It's probably fast enough, but I'm wondering if it wouldn't be worth it to install the dependencies in two steps: first `dependencies` in a first image, then in a second image, copy those and rerun `npm install` to also install the `devDependencies`. You could then copy in the final image:

  - The production dependencies from the `deps` image
  - The built code from the `build` image

2. Also, it's probably a detail, but you're copying the entire app folder in the final image, maybe you could save some extra bytes by only copying the built artifacts (e.g. `dist/` in most setups).

[h1fra]

Thanks.

1. That's interesting, I actually never thought about that. It could work in practice and could even be parallelised! It would just download some, or most, packages twice. I'll test that, thanks.

2. Indeed, it's easier when building a small repo but with a monorepos you need to be careful about copying the /dist at the right place + the package.json to not break runtime import. I think once again it's balance between what would be perfect and what we can live with.